Add --local option to force installation to user bin directory, preventing automatic fallback when sudo is unavailable

install-git-credential-manager.sh

@@ -511,6 +511,7 @@ show_usage() {
     echo "  -v, --version  Install specific version (default: latest)"
     echo "  -f, --force    Force reinstall even if already installed"
     echo "  -r, --reinstall Reinstall the current installed version"
+    echo "  -l, --local    Force installation to user bin directory (~/.bin)"
     echo "  -p, --package  Force installation from package manager"
     echo "  -d, --deb      Force installation from DEB package"
     echo "  -t, --tarball  Force installation from tarball"
@@ -520,6 +521,7 @@ show_usage() {
     echo "  $0                    # Install latest version using best method"
     echo "  $0 -v v2.6.0         # Install specific version"
     echo "  $0 --reinstall        # Reinstall current version"
+    echo "  $0 --local            # Force installation to user bin"
     echo "  $0 --package          # Force installation from package manager"
     echo "  $0 --deb             # Force installation from DEB package"
     echo "  $0 --checks           # Check configuration without installing"
@@ -556,6 +558,7 @@ main() {
     local target_version=""
     local force_reinstall=false
     local reinstall_current=false
+    local local_install=false
     local install_method="auto"
     local checks_only=false
 
@@ -578,6 +581,10 @@ main() {
                 reinstall_current=true
                 shift
                 ;;
+            -l|--local)
+                local_install=true
+                shift
+                ;;
             -p|--package)
                 install_method="package"
                 shift
@@ -643,21 +650,20 @@ main() {
     # Detect system
     detect_os
     ARCH=$(get_arch)
-    
-    # Create temporary directory
-    mkdir -p "$TEMP_DIR"
-    
-    # Trap cleanup on exit
-    trap cleanup EXIT
-    
-    # Installation logic based on method
-    case $install_method in
-        auto)
-            # Try package manager first
-            if install_from_package_manager; then
-                verify_installation
-                exit 0
-            fi
+
+    # Check for local installation
+    if [[ "$local_install" == "true" ]]; then
+        print_error "Git Credential Manager requires system installation for proper integration"
+        exit 1
+    fi
+
+    # Get latest version if not specified
+    if [[ -z "$target_version" ]]; then
+        get_latest_release
+        target_version="$LATEST_VERSION"
+    else
+        print_status "Using specified version: $target_version"
+    fi
             
             # Fall back to distribution-specific methods
             case $OS in